Christ's declaration that His blood is shed for many assures us that His atonement is effective for a specific group of people, namely the elect.
In Mark 14:24, Jesus explicitly states that His blood is shed for many, which highlights the particular nature of His atonement. This statement underscores the Reformed understanding of limited atonement, affirming that Christ's sacrifice was not a mere potentiality for all but a definitive provision for those whom the Father has chosen. This assurance means that the salvation Christ achieved is effectual for those who are redeemed, ensuring their perseverance in faith. The security of salvation rests in the absolute sufficiency of Christ's work on the cross, securing the eternal redemption of the many He came to save.
Commentary